Rotation transmission device and wind power generation device equipped with the same

• US 9,995,349 B2
• Filed: 08/11/2014
• Issued: 06/12/2018
• Est. Priority Date: 08/12/2013
• Status: Active Grant

• Current Assignee: Jtekt Corporation (Toyota Motor Corporation)
• Original Assignee: Jtekt Corporation (Toyota Motor Corporation)
• Inventors: Fujiwara, Hideki
• Primary Examiner(s): Shah, Manish S
• Assistant Examiner(s): Plumb, Nigel
• Application Number:
  US14/909,684
• Publication Number:
  US 20160195145A1
• Time in Patent Office: 1,401 Days
• Field of Search: 7386208, 73862041, 73862, 73 108, 73 101
• CPC Class Codes: F03D 15/00 Transmission of mechanical power
• CPC Class Codes: F03D 15/10 using gearing not limited to rotary motion, e.g. with oscillating or reciprocating members
• CPC Class Codes: F03D 80/70 Bearing or lubricating arrangements
• CPC Class Codes: F03D 9/25 the apparatus being an electrical generator F03D9/22 takes precedence
• CPC Class Codes: F05B 2260/403 through the shape of the drive components
• CPC Class Codes: F16C 19/28 with two or more rows of rollers
• CPC Class Codes: F16C 2360/31 Wind motors
• CPC Class Codes: F16C 33/581 integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
• CPC Class Codes: F16C 41/001 Integrated brakes or clutches for stopping or coupling the relatively movable parts
• CPC Class Codes: F16D 2041/0603 Sprag details
• CPC Class Codes: F16D 2041/0608 Races with a regular polygon shape
• CPC Class Codes: F16D 2041/0665 characterised by there being no cage other than the inner and outer race for distributing the intermediate members
• CPC Class Codes: F16D 2500/10493 One way clutch
• CPC Class Codes: F16D 2500/3021 Angle
• CPC Class Codes: F16D 2500/3027 Torque
• CPC Class Codes: F16D 2500/3028 Voltage
• CPC Class Codes: F16D 2500/5023 Determination of the clutch wear
• CPC Class Codes: F16D 2500/70408 Torque
• CPC Class Codes: F16D 41/063 the intermediate members wedging by moving along the inner and the outer surface without pivoting or rolling, e.g. sliding wedges F16D41/061 takes precedence
• CPC Class Codes: F16D 41/066 all members having the same size and only one of the two surfaces being cylindrical
• CPC Class Codes: F16D 41/07 : between two cylindrical surfaces
• CPC Class Codes: F16D 48/00 : External control of clutches
• CPC Class Codes: F16D 48/02 : Control by fluid pressure
• CPC Class Codes: F16D 48/06 : Control by electric or electronic means, e.g. of fluid pressure
• CPC Class Codes: G01L 3/1407 : involving springs
• CPC Class Codes: G01L 3/1435 : involving magnetic or electromagnetic means
• CPC Class Codes: G01L 3/1457 : involving resistance strain gauges
• CPC Class Codes: G01L 5/0019 : by using strain gages, piezoelectric, piezo-resistive or other ohmic-resistance based sensors
• CPC Class Codes: G01L 5/0023 : by using magnetic sensors
• CPC Class Codes: G01L 5/0042 : applying a torque
• CPC Class Codes: G01L 5/0071 : Specific indicating arrangements, e.g. of overload
• CPC Class Codes: G01M 13/022 : Power-transmitting couplings or clutches
• CPC Class Codes: H02K 7/003 : Couplings; Details of shafts means for mounting rotors on shafts H02K1/28
• CPC Class Codes: H02K 7/10 : Structural association with clutches, brakes, gears, pulleys or mechanical starters
• CPC Class Codes: H02K 7/183 : wherein the turbine is a wind turbine adaptation of a wind turbine to an electric generator F03D9/25
• CPC Class Codes: Y02E 10/72 : Wind turbines with rotation axis in wind direction

Abstract

A rotation transmission device includes a one-way clutch which is provided between an output shaft of a speed increaser and an input shaft of a generator, which makes a connection between the output shaft and the input shaft to be rotatable integrally in a state in which a rotation speed of the output shaft is higher than that of the input shaft, and which cuts off the connection between the output shaft and the input shaft in a state in which the rotation speed of the output shaft is lower than that of the input shaft. The rotation transmission device further includes: a measurement section which measures a state of the one-way clutch which changes depending on a load exerted to the one-way clutch; and an acquisition section which acquires the load exerted to the one-way clutch on a basis of a measurement result of the measurement section.

Claims

1. A rotation transmission device, comprising:

a one-way clutch that is provided between an output shaft of a speed increaser, which increases rotation of a main spindle in a wind power generation device, and an input shaft of a generator, to which rotation of the output shaft is input so as to generate electric power, the one-way clutch making a connection between the output shaft and the input shaft so as to be rotatable integrally in a state in which a rotation speed of the output shaft is higher than a rotation speed of the input shaft, and which cuts off the connection between the output shaft and the input shaft in a state in which the rotation speed of the output shaft is lower than the rotation speed of the input shaft;

a measurement section that measures a state of the one-way clutch, which changes depending on a load exerted to the one-way clutch; and

an acquisition section that acquires the load exerted to the one-way clutch on a basis of a measurement result of the measurement section,

wherein;

the one-way clutch comprises;

an inner ring and an outer ring; and

a plurality of engagement elements disposed between the inner ring and the outer ring,

the engagement elements are engaged with the inner ring and the outer ring to make the connection between the output shaft and the input shaft so as to be rotatable integrally, and are released from engagement to cut off the connection, and

the measurement section comprises a strain sensor that measures a distortion generated in the inner ring or the outer ring by the engagement of the engagement elements.

3. The rotation transmission device according to claim 1,

wherein the one-way clutch comprises cam faces on an inner peripheral face of the outer ring or an outer peripheral face of the inner ring to form wedge-shaped spaces between the inner ring and the outer ring.

5. A wind power generation device comprising:

a speed increaser that increases rotation of a main spindle rotated by wind power, and that outputs the rotation from an output shaft;

a generator to which the rotation of the output shaft is input through an input shaft thereof to generate electric power;

the rotation transmission device according to claim 1; and

an adjustment section that adjusts an electric load of the generator depending on the load acquired by the acquisition section of the rotation transmission device.

6. The wind power generation device according to claim 5, further comprising:

a transmission section that transmits information indicating the state of the one-way clutch or information indicating the load exerted to the one-way clutch to an outside of the wind power generation device.

14. The rotation transmission device according to claim 3,

wherein the strain sensor is provided on an inner peripheral face of the inner ring at an inside of the cam face of the inner ring in a radial direction or is provided on an outer peripheral face of the outer ring at an outside of the cam face of the outer ring in the radial direction.

2. A rotation transmission device comprising:

a one-way clutch that is provided between an output shaft of a speed increaser, which increases rotation of a main spindle in a wind power generation device, and an input shaft of a generator, to which rotation of the output shaft is input so as to generate electric power, the one-way clutch making a connection between the output shaft and the input shaft so as to be rotatable integrally in a state in which a rotation speed of the output shaft is higher than a rotation speed of the input shaft, and which cuts off the connection between the output shaft and the input shaft in a state in which the rotation speed of the output shaft is lower than the rotation speed of the input shaft;

a measurement section that measures a state of the one-way clutch which changes depending on a load exerted to the one-way clutch; and

an acquisition section that acquires the load exerted to the one-way clutch on a basis of a measurement result of the measurement section,

wherein;

the one-way clutch comprises;

an inner ring and an outer ring; and

a plurality of engagement elements disposed between the inner ring and the outer ring,

the engagement elements are engaged with the inner ring and the outer ring to make the connection between the output shaft and the input shaft so as to be rotatable integrally, and are released from engagement to cut off the connection, and

wherein the measurement section comprises a gap sensor that measures a movement amount of the engagement element in a circumferential direction when the engagement element is engaged with the inner ring and the outer ring.

4. The rotation transmission device according to claim 2,

wherein the one-way clutch comprises sprags serving as the engagement elements.

12. The rotation transmission device according to claim 2,

wherein the one-way clutch comprises cam faces on an inner peripheral face of the outer ring or an outer peripheral face of the inner ring to form wedge-shaped spaces between the inner ring and the outer ring.

15. The rotation transmission device according to claim 2,

wherein the gap sensor is provided to oppose the engagement element in the circumferential direction, and measures a gap between the engagement element and the gap sensor in the circumferential direction.

7. A rotation transmission device comprising:

a one-way clutch that is provided between an output shaft of a speed increaser, which increases rotation of a main spindle rotated by wind power and which outputs the rotation from the output shaft, and an input shaft of a generator, to which the rotation of the output shaft is input so as to generate electric power,

wherein;

the one-way clutch comprises;

an inner ring provided on one of the output shaft and the input shaft;

an outer ring provided on the other of the output shaft and the input shaft; and

rollers disposed in wedge-shaped spaces between the inner ring and the outer ring,

the one-way clutch makes a connection between the output shaft and the input shaft so as to be rotatable integrally by engaging the rollers with the inner ring and the outer ring in a case in which a rotation speed of the output shaft is higher than a rotation speed of the input shaft, and cuts off the connection by releasing engagement in a case in which the rotation speed of the output shaft is lower than the rotation speed of the input shaft,

the rotation transmission device further comprises a detection mechanism that detects a torsion angle between the inner ring and the outer ring caused by a change in a load torque of the generator, and

the detection mechanism comprises a detection section that directly detects a change in an angle due to a relative rotation between the inner ring and the outer ring.

8. The rotation transmission device according to claim 7, further comprising:

a determination section that determines an abrasion state of the inner ring and the outer ring of the one-way clutch on a basis of the torsion angle depending on a change amount of the load torque.

9. The rotation transmission device according to claim 7,

wherein the detection mechanism comprises:

a first detection section that detects an absolute angle of the inner ring;

a second detection section that detects an absolute angle of the outer ring; and

a calculation section that obtains a difference between detection values of the first and second detection sections.

10. The rotation transmission device according to claim 8, further comprising:

a transmission section that transmits a determination result of the determination section to an outside of the wind power generation device.

11. A wind power generation device comprising:

a speed increaser that increases rotation of a main spindle rotated by wind power, and that outputs the rotation from the output shaft thereof;

a generator to which the rotation of the output shaft is input through an input shaft thereof to generate electric power; and

the rotation transmission device according to claim 7.

13. The rotation transmission device according to claim 8,

wherein the detection mechanism comprises:

a first detection section that detects an absolute angle of the inner ring;

a second detection section that detects an absolute angle of the outer ring; and

a calculation section that obtains a difference between detection values of the first and second detection sections.

16. The rotation transmission device according to claim 7,

wherein the detection section comprises an encoder, the encoder comprising:

a detector attached to a first shaft, which is one of the output shaft and the input shaft, or a first rotor integrally rotatable with the first shaft; and

a pulser ring attached to a second shaft, which is the other of the output shaft and the input shaft, or a second rotor integrally rotatable with the second shaft, so as to oppose the detector.